Generation of optical OFDM signals using 214 GS/s real time digital signal processing | Zendy

Y. Benlachtar | Zendy; Philip M. Watts | Zendy; Rachid Bouziane | Zendy; Peter Milder | Zendy; Deepak Rangaraj | Zendy; Anthony Cartolano | Zendy; Robert Koutsoyannis | Zendy; James C. Hoe | Zendy; Markus Püschel | Zendy; Madeleine Glick | Zendy; Robert I. Killey | Zendy

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Generation of optical OFDM signals using 214 GS/s real time digital signal processing

Author(s) -

Y. Benlachtar,

Philip M. Watts,

Rachid Bouziane,

Peter Milder,

Deepak Rangaraj,

Anthony Cartolano,

Robert Koutsoyannis,

James C. Hoe,

Markus Püschel,

Madeleine Glick,

Robert I. Killey

Publication year - 2009

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.17.017658

Subject(s) - orthogonal frequency division multiplexing , computer science , electronic engineering , transmitter , fast fourier transform , signal (programming language) , digital signal processing , multiplexing , signal processing , bit error rate , computer hardware , telecommunications , engineering , channel (broadcasting) , algorithm , programming language

We demonstrate a field programmable gate array (FPGA) based optical orthogonal frequency division multiplexing (OFDM) transmitter implementing real time digital signal processing at a sample rate of 21.4 GS/s. The QPSK-OFDM signal is generated using an 8 bit, 128 point inverse fast Fourier transform (IFFT) core, performing one transform per clock cycle at a clock speed of 167.2 MHz and can be deployed with either a direct-detection or a coherent receiver. The hardware design and the main digital signal processing functions are described, and we show that the main performance limitation is due to the low (4-bit) resolution of the digital-to-analog converter (DAC) and the 8-bit resolution of the IFFT core used. We analyze the back-to-back performance of the transmitter generating an 8.36 Gb/s optical single sideband (SSB) OFDM signal using digital up-conversion, suitable for direct-detection. Additionally, we use the device to transmit 8.36 Gb/s SSB OFDM signals over 200 km of uncompensated standard single mode fiber achieving an overall BER<10(-3).

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